diff --git a/package.json b/package.json
index 0b84aa3e..1cc686e2 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
     "name": "openapi-typescript-codegen",
-    "version": "0.12.1",
+    "version": "0.12.2",
     "description": "Library that generates Typescript clients based on the OpenAPI specification.",
     "author": "Ferdi Koomen",
     "homepage": "https://github.com/ferdikoomen/openapi-typescript-codegen",
diff --git a/src/templates/core/xhr/sendRequest.hbs b/src/templates/core/xhr/sendRequest.hbs
index 4addf125..8205edea 100644
--- a/src/templates/core/xhr/sendRequest.hbs
+++ b/src/templates/core/xhr/sendRequest.hbs
@@ -17,6 +17,7 @@ async function sendRequest(
     return new Promise<XMLHttpRequest>((resolve, reject) => {
         xhr.onload = () => resolve(xhr);
         xhr.onabort = () => reject(new Error('The user aborted a request.'));
+        xhr.onerror = () => reject(new Error('Network error.'));
         xhr.send(body || formData);
 
         onCancel(() => xhr.abort());